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Mademuasel [1]
3 years ago
14

A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works? It removes

thermal energy from the air inside the container. It removes thermal energy from the frozen foods inside the container. It reduces the amount of thermal energy that is transferred from inside to outside the container. It reduces the amount of thermal energy that is transferred from outside to inside the container.
Physics
1 answer:
Allushta [10]3 years ago
6 0

Answer:

the foam an insulator............

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The device shown below contains 2 kg of water. The cylinder is allowed to fall 800 m during which the temperature of the water i
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Answer:

C. 2 kg

Explanation:

From the problem , it appears that due to fall by 800m (h )  , potential energy is converted into heat energy which increases the temperature of water . Let the mass of cylinder falling be M , h be the height

loss of potential energy = Mgh

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let heat generated increases a temperature rise of Δt in the mass of water m

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msΔt = Mgh

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Δt = K / m ( M , g , h and s are constant in both the case)

For first case  ,

m = 2 kg and Δt  = 2.4

2.4 = K / 2

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For second case

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mass added = 4 - 2

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+1

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